Truck Insurance Exchange v. Magnetek, Inc.

                                                                        F I L E D
                                                                 United States Court of Appeals
                                                                         Tenth Circuit
                                    PUBLISH
                                                                         FEB 25 2004
                   UNITED STATES COURT OF APPEALS
                                                                      PATRICK FISHER
                                                                             Clerk
                               TENTH CIRCUIT



 TRUCK INSURANCE EXCHANGE, a
 Farmers Insurance Company,

             Plaintiff-Appellant,
       v.                                               No. 03-1026
 MAGNETEK, INCORPORATED,

             Defendant-Appellee.


        APPEAL FROM THE UNITED STATES DISTRICT COURT
                FOR THE DISTRICT OF COLORADO
                   (D.C. NO. 00-RB-2218 (CBS))


Clifton J. Latiolais, Jr. (Colin C. Campbell with him on the briefs) Campbell,
Latiolais & Ruebel, P.C., Denver, Colorado, for Plaintiff-Appellant Truck
Insurance Exchange.

Brent D. Anderson, Snell & Wilmer, LLP, Denver, Colorado, for Defendant-
Appellee MagneTek, Incorporated.


Before EBEL , BRISCOE , and TYMKOVICH , Circuit Judges.


TYMKOVICH , Circuit Judge.


      On November 9, 1998, a fire destroyed Sammy’s Restaurant in Lakewood,

Colorado. In this subrogation case, plaintiff Truck Insurance Exchange claims
that a flourescent light ballast manufactured by defendant MagneTek,

Incorporated, caused the fire, and seeks to recover over $1.5 million paid out to

Sammy’s. The district court’s jurisdiction was based on diversity between Truck,

a California corporation, and MagneTek, a Delaware corporation with its

principal place of business in Tennessee. See 28 U.S.C. §§ 1332, 1446. We have

jurisdiction on appeal pursuant to 28 U.S.C. § 1291.

      Following the completion of discovery, MagneTek moved to exclude

certain opinion testimony of Truck’s experts under Daubert v. Merrell Dow

Pharmaceuticals, Inc., 509 U.S. 579 (1993). The district court granted

MagneTek’s Daubert motions in part, finding that the experts’ conclusions about

the cause of the fire were not based on a sufficiently reliable scientific theory.

The district court then ruled that without such expert testimony a rational trier of

fact could not find for Truck, and granted summary judgment in favor of

MagneTek.

      Truck appeals both of these decisions and we affirm.

                                     Background

      The afternoon of November 9, 1998, crews from the West Metro Fire

Protection District responded to a report of smoke coming from Sammy’s

Restaurant. When firemen arrived at the restaurant they encountered heavy

smoke, but no open flames. The firemen could not locate the source of the smoke


                                          -2-
until the fire broke through the kitchen floor and the ceiling of the storage area

below. The fire then quickly spread and destroyed the building.

      Investigators from the West Metro Fire Protection District and Phoenix

Investigations, a private fire inspection company hired by Truck, performed the

initial investigation of the fire. They began by sifting through the fire debris to

identify burn patterns and other evidence of the fire’s origin and cause. The

investigators concluded that the fire started in the void space between the

basement storeroom ceiling and the kitchen floor.

      Amongst the debris in the basement, the investigators found a flourescent

light fixture that had been mounted to the storeroom ceiling. Three investigators,

Lt. Dan Pfannenstiel of the West Metro Fire Protection District, and Thomas

McAdam and George Hodge of Phoenix Investigations, concluded that the light

fixture somehow started the fire because there were no other apparent heat

sources in the area of the fire’s origin. 1 Knowing that flourescent light fixtures

contain a component called a “ballast” that is designed to control the amount of

heat the fixture can generate, the investigators then focused on the ballast as a

likely cause of the fire.


      1
        Electrical wiring also ran through the void area, but the investigators did
not see any evidence of electrical short or other malfunction and dismissed the
wiring as a potential cause of the fire. MagneTek points out that by the time it
became involved in this litigation all the physical evidence from the scene, other
than the light fixture, had been destroyed.

                                          -3-
       After their initial examination, Pfannenstiel and McAdam turned the fixture

over to Hodge of Phoenix Investigations and Dr. Joe Romig of Ponderosa

Associates, another investigation firm hired by Truck, for further analysis. Hodge

disassembled the fixture and examined the various parts of the ballast in an effort

to determine both its manufacturer and whether it had in fact overheated.

Eventually, these analysts determined that the ballast had been manufactured by

MagneTek. They also observed oxidation patterns on the fixture and

discoloration of the ballast’s heating coils that suggested the ballast had shorted,

causing internal overheating prior to the external fire.

       The ballast contained a device called a thermal protector, which is designed

to shut off power running through the fixture if the temperature exceeds 232°

Fahrenheit, well below the approximately 400°F generally believed to be the

minimum temperature necessary to ignite wood. Once the temperature falls

sufficiently, the thermal protector restores power. Both parties agree that the

thermal protector in the ballast from Sammy’s continued to function properly even

after the fire.

       Because they had eliminated any other heat source, Truck’s experts

remained convinced that the ballast was the likely cause of the fire. They

therefore began to study how the ballast might have started a fire in spite of the

functioning thermal protector.


                                          -4-
        Truck’s experts conducted a series of simulations, at least one of which

showed that a shorted “exemplar” (or test) ballast of a type similar to that found

at Sammy’s reached temperatures of 340° before the thermal protector began to

cycle on and off. The test ballast eventually reached stable temperatures over

300°.

        Though both this peak temperature and the stable temperature are

significantly below normal wood ignition temperature, Romig proposed to testify

that this level of overheating was sufficient to have caused the Sammy’s fire.

Romig based his conclusion that the shorted ballast could have and, in his

opinion, did start the fire on a theory called “pyrolysis,” which posits that wood

can catch fire at temperatures below 400° if it is exposed to such temperatures

over a long enough period of time. 2 Pfannenstiel’s testimony likewise would have

been that in his opinion the ballast caused the fire. His opinion was based not on

scientific theory, but on his experience as an investigator and his having

eliminated any other possible heat source as a cause.




        2
         We note that there appears to be some confusion among the parties, the
district court, and apparently even the scientific community as to the proper
terminology for the theory of long-term, low-temperature wood ignition and the
charring it involves. This court is not in a position to decide such questions for
the scientific community, but for the purposes of this opinion, we will refer to this
process as “pyrolysis.” To the extent we use the term “pyrophoric carbon,” we
are talking about the substance charred wood.

                                          -5-
      MagneTek, disagreeing that pyrolysis could be relied upon to explain the

start of the fire, and further disagreeing that the evidence supported the

conclusion that there was no other possible source of the fire, moved to exclude

the opinions of both Romig and Pfannenstiel and for summary judgment.

Applying Daubert and its progeny, the trial court granted these motions to the

extent the experts expressed opinions about the actual cause of the fire. 3 The end

result was that Truck had no expert testimony showing that the ballast could have

reached temperatures approaching 400° or that wood can catch fire below that

temperature. The court then concluded that without any such evidence, Truck

could not establish causation, an essential element of all its claims, and granted

MagneTek’s motion for summary judgment.

                                     Discussion

                         I. Exclusion of Expert Testimony

      Rule 702 of the Federal Rules of Evidence states:

      If scientific, technical, or other specialized knowledge will assist the
      trier of fact to understand the evidence or to determine a fact in
      issue, a witness qualified as an expert by knowledge, skill,
      experience, training or education, may testify thereto in the form of
      an opinion or otherwise, if (1) the testimony is based upon sufficient
      facts or data, (2) the testimony is the product of reliable principles



      3
          MagneTek’s motions also sought to exclude other expert testimony, which
the trial court granted in part . On appeal, however, Truck has only asked us to
reverse the court’s decisions as to Romig and Pfannenstiel.

                                         -6-
      and methods, and (3) the witness has applied the principles and
      methods reliably to the facts of the case.

Fed. R. Evid. 702. The Supreme Court has laid out a framework for analyzing

proffered expert testimony in the so-called Daubert trilogy, which consists of

Daubert, General Electric Co. v. Joiner, 522 U.S. 136 (1997), and Kumho Tire

Co., Ltd. v. Carmichael, 526 U.S. 137 (1999).

      Analysis under Daubert is intended to ensure that the evidence is both

“reliable” and “relevant.” See 509 U.S. at 589. In this case, the district court

addressed only the first of these requirements, and found that the conclusions of

Dr. Romig and Lt. Pfannenstiel were not sufficiently reliable.

      To determine the reliability of expert testimony, courts assess “whether the

reasoning or methodology underlying the testimony is scientifically valid.”

Daubert, 509 U.S. at 592-93. In Daubert, the Court listed four factors that, while

not an exclusive list of considerations for a trial court, will often be important in

making this assessment: (1) whether the opinion has been subjected to testing or

is susceptible of such testing; (2) whether the opinion has been subjected to

publication and peer review; (3) whether the methodology used has standards

controlling its use and known rate of error; (4) whether the theory has been

accepted in the scientific community. See id. at 590.

      We have summarized the burden of the plaintiff to show the reliability of

proffered expert opinions this way:

                                          -7-
      The plaintiff need not prove that the expert is undisputibly correct or
      that the expert’s theory is “generally accepted” in the scientific
      community. Instead, the plaintiff must show that the method
      employed by the expert in reaching the conclusion is scientifically
      sound and that the opinion is based on facts which sufficiently satisfy
      Rule 702’s reliability requirements.

Mitchell v. Gencorp Inc., 165 F.3d 778, 781 (10th Cir. 1999) (citations omitted).

      We review the district court’s application of Daubert to exclude expert

testimony for abuse of discretion. See Joiner, 522 U.S. at 143; Mitchell, 165 F.3d

at 780. The trial court is afforded substantial deference in its application of

Daubert. See Hollander v. Sandoz Pharm. Corp., 289 F.3d 1193, 1204 (10th Cir.

2002) (citing Kumho Tire, 526 U.S. at 1152). Therefore we will only disturb the

trial court’s decision if we have “a definite and firm conviction that the lower

court made a clear error of judgment or exceeded the bounds of permissible

choice in the circumstances.” United States v. Ortiz, 804 F.2d 1161, 1164 n.2

(10th Cir. 1986). 4

Dr. Romig

      Dr. Romig has advanced degrees in physics from Oxford University and the

University of Colorado and has been studying the causes of fires and explosions


      4
        This court recently outlined the minimal gatekeeping role required of trial
courts under the Daubert trilogy in Dodge v. Cotter Corp., 328 F.3d 1212 (10th
Cir. 2003). The extensive review of the proposed testimony, scientific materials,
and other evidence reflected in the record and summarized in the court’s various
orders regarding expert testimony show that the court fulfilled this gatekeeping
role.

                                          -8-
for over 20 years. There is no question he is qualified to testify as an expert

under Rule 702. Nor is there any question that his opinion as to the cause of the

Sammy’s fire would have been relevant. After reviewing the reliability

requirements of the Daubert trilogy, however, the district court concluded that

“the hypothesis for long term, low temperature ignition of wood cannot be

considered to be a reliable basis for the admission of expert opinion testimony

under Rule 702.” The court therefore granted MagneTek’s motion to strike “as to

testimony by Romig that the flourescent light ballast at issue in this case caused

the fire which is the basis for the plaintiff’s claims.”

      The district court accurately summarized the relevant struck testimony by

Romig as follows:

      Romig’s most crucial opinion in this case is his opinion that heat
      from the ballast, varying between 180 and 300 degrees Fahrenheit,
      was sufficient to cause one of the furring strips in the ceiling to catch
      on fire. Romig would testify that this long term heating of the
      ceiling and the furring strips caused the formation of so-called
      pyrophoric carbon or activated carbon in a furring strip. According
      to Romig, with the formation of pyrophoric carbon, and given
      otherwise proper conditions, ignition of wood can occur when the
      wood is exposed to long term heating within the temperature ranges
      he says the MagneTek ballast produced. Such carbon is said to “self-
      heat” and thus may cause a fire. This type of ignition, Romig would
      testify, most likely caused the fire at Sammy’s Restaurant.

App. at 28-29 (internal citations to depositions and exhibits omitted). The district

court gave two alternative reasons for its decision to exclude this testimony,

finding both that the long-term, low-temperature ignition theory was unreliable,

                                           -9-
and that it had not been reliably applied to the facts of this case. Because we find

that the court did not abuse its discretion in finding that the testimony was not

“the product of reliable principles and methods,” we need not address whether it

was or could be reliably applied. 5 See Fed. R. Evid. 702; Mitchell, 165 F.3d at

781.

       Truck introduced three publications to support the pyrolysis theory

underpinning Romig’s opinion. As the district court noted, all three do indeed

posit that pyrolysis could explain the origin of some fires. The district court was

also correct, however, when it found that all three cast doubt on the general

scientific acceptance, the methodology, and the adequacy of the experimentation

underlying pyrolysis at this time. It was therefore within the district court’s

discretion to reject the theory as insufficiently reliable to form the basis of expert

testimony.

       The first article discussed, by John D. DeHaan, reviews two studies that

concluded that wood heated to temperatures below 250° could, over “a period of


       5
        We do note, however, that Truck failed to introduce evidence of actual
experiments conducted by its experts showing that furring strips attached in a
ceiling to 5/8 inch gypsum board that held a light fixture, as at Sammy’s, could
ignite at low temperatures due to pyrolysis. Truck consequently failed to address
the points raised by the district court in its alternative ruling that pyrolysis had
not been reliably applied, including the role played by the size of the wood in
question and the flow of oxygen to it and the dissipation of heat as it flowed from
the ballast through the intermediate materials, such as metal and drywall, to the
wood that allegedly ignited.

                                         -10-
years” or a “very long time,” degrade into charcoal, which would eventually

ignite. The district court, however, found that both studies gave “only vague

parameters” to the conditions required for such an event to occur, and that neither

described testing that could have specified those conditions.

      The second article, by Vytenis Babrauskas, is even more dubious as a

foundation for pyrolysis. 6 The Babrauskas article discusses the same materials

reviewed by DeHaan, and notes an additional study that found that wood exposed

“for a few years” to temperatures between 120° and 150° Celsius (250°-300°

Fahrenheit) would char. It also states that other studies “have done nothing to

disprove the possibility of long-term, low-temperature ignitions of wood.”

Babrauskas goes on, however, to list “[a] number of things not known about the

process,” and to state that the question, “while unsolved now, can be solved. It

may be many decades before it will be solved by sufficiently improving theory.”

Also, the studies showing low temperature charring do not find actual ignition of

the charred wood. The article concludes that “the phenomenon of long-term, low-

temperature ignition of wood has neither been proven nor successfully disproven

at this time.”




      6
       We note, though Truck chose not to, that the title of this article is
“Pyrophoric Carbon: The Jury Is Still Out.”

                                        -11-
      The final article relied on by Truck, by Bernard R. Cuzzillo and Patrick J.

Pagni, is generally supportive of the theory of pyrolysis, and describes one

experiment in which an 8-inch cube of solid wood caught fire after nine days in

an oven heated to 392°F. The district court noted that Cuzzillo and Pagni,

however, did not cite any testing of wood at temperatures closer to the 300-340°

at issue in this case. Furthermore, Cuzzillo and Pagni themselves highlight

unanswered questions about the interaction of important factors such as “[s]ize,

shape, temperature and material characteristics,” and state that “[t]he time needed

to adequately cook wood to the point of uninhibited self-heating at different

temperatures is not well known.”

      Romig himself underscored the scientific uncertainty about the pyrolytic

process. During his deposition he stated that the process “depends on a lot of

factors, as yet quantitatively unidentified.” He later acknowledged that to

understand how the furring strips could ignite at low temperatures, “[y]ou would

have to have a good theory of pyrophoric carbon and formation and the chemical

kinetics of that; and there isn’t one, as Babrauskas points out.”

      Surveying this evidence, the district court concluded that “when

considering the temperatures at issue here, the long term, low temperature

ignition of wood is an hypothesis which has not been subjected to sufficient

testing. Without such testing, there are few if any reliable principles about the


                                         -12-
phenomenon and methods to determine when the phenomenon might occur.” The

court therefore ruled that the hypothesis could not be considered “a reliable basis

for the admission of expert testimony under Rule 702.”

      Given the cautionary statements about the reliability and foundation of

pyrolysis from the authors of the articles offered by Truck and from Truck’s own

expert, we cannot conclude that the district court abused its discretion in

excluding Dr. Romig’s opinion testimony. 7 We are faced with a situation similar

to that in Mitchell, where this court held that “the analytical gaps in [the experts’]

opinions are too broad for their testimony to endure under the strictures of

Daubert and Rule 702.” Mitchell, 165 F.3d at 783. As in Mitchell, several of the

Daubert Court’s non-dispositive factors support the district court’s decision,

including the insufficient testing cited by the district court, as well as a lack of



      7
         Truck argues that MagneTek cannot contest the validity of the pyrolysis
theory because MagneTek’s own expert admitted its reliability. Even to the
extent MagneTek’s experts did accept that pyrolysis is the subject of scientific
study, we note that they too expressed doubts about the theory’s reliability,
approvingly referring to the title of the Babrauskas article. More importantly,
however, the district court’s gatekeeper role requires it to examine the basis for
challenged expert testimony to determine its reliability looking beyond the
testimony of the witnesses before it to the scientific foundation for that testimony.
See Dodge, 328 F.3d at 1221-22. To the extent MagneTek’s experts
acknowledged Romig’s theory in general, the contrary evidence examined by the
trial court and summarized above remains strong enough to convince us that the
trial court did not “exceed the bounds of permissible choice in the
circumstances.” See Beaird v Seagate Tech, Inc., 145 F.3d 1159, 1164 (10th Cir.
1998).

                                         -13-
evidence showing how Dr. Romig’s opinion could be tested and his theory’s

applicable rate of error, and questions about the theory in the scientific

community. See Mitchell, 165 F.3d at 784. The district court therefore did not

abuse its discretion when it ruled that under the Daubert trilogy, pyrolysis was not

yet a sufficiently reliable scientific theory upon which to base an expert opinion

about the cause of the Sammy’s fire. See 509 U.S. at 592-93.

      Lt. Pfannenstiel

      Lt. Dan Pfannenstiel is an investigator with the West Metro Fire Protection

District. He, along with Thomas McAdam of Phoenix Investigations, initially

investigated the Sammy’s fire and offered testimony on behalf of Truck detailing

their findings, as well as expert opinions about the origin and cause of the fire.

Pfannenstiel and McAdam concluded that the fire started in the void between the

basement ceiling and the kitchen floor, and that the light fixture was both located

in the area of ignition and was the only potential source of ignition in the area.

They further offered their opinions that the ballast was in fact the cause of the

fire. The district court struck both Pfannenstiel’s and McAdams’s opinion

testimony about the ballast.

      Truck has appealed only the district court’s striking of Pfannenstiel’s

testimony. As with Dr. Romig, Pfannenstiel’s status as an expert and the

relevance of his proffered opinion are not in question. The only issue, again, is


                                         -14-
“whether the reasoning or methodology underlying the testimony is scientifically

valid.” Daubert, 509 U.S. at 592-93.

      In its order, the district court stated that the opinion that the ballast caused

the fire was not admissible under Rule 702 because Pfannenstiel did not have

“any evidence that the ballast could generate enough heat to ignite combustibles

in the ceiling.” His conclusion therefore “cannot be said to be based on reliable

principles and methods. Rather, th[is] opinion[ is] based on assumptions and

speculation.” We find no abuse of discretion in this ruling.

      The district court noted that Pfannenstiel’s opinion did not meet the

standards of fire investigation Pfannenstiel himself professed he adhered to.

According to Pfannenstiel, those standards require that an investigator who

suspects an appliance may have started a fire first determine the ignition

temperature for the fuel, then determine whether the heat source was capable of

generating that temperature. The discussion above regarding Romig’s testimony

shows that Pfannenstiel’s opinion regarding the first prong of the analysis – the

ignition temperature – could not be based on the pyrolysis theory of low-

temperature ignition. The only evidence Pfannenstiel or the court had about the

second prong – the temperature of the ballast – showed in post-fire testing that

the ballast could not have reached the temperatures necessary to ignite it under

any other theory.


                                         -15-
       In reaching his conclusion that the ballast started the fire, therefore,

Pfannenstiel either was relying on the pyrolysis theory the district court found

unreliable, or he was making assumptions about the temperature of the ballast that

were not supported by the evidence. In either case, the district court was within

its discretion in not admitting Pfannenstiel’s opinion that the ballast was the cause

of the fire.

                                II. Summary Judgment

       Truck maintains that even without the excluded expert opinions identifying

the ballast as the cause of the fire, the court nevertheless erred in granting

summary judgment to MagneTek. We review the grant of summary judgment de

novo, applying the same standard as the district court. Simms v. Oklahoma ex rel.

Dep’t of Mental Health & Substance Abuse Servs., 165 F.3d 1321, 1326 (10th Cir.

1999). Summary judgment is appropriate “if the pleadings, depositions, answers

to interrogatories, and admissions on file, together with the affidavits, if any,

show that there is no genuine issue as to any material fact and that the moving

party is entitled to a judgment as a matter of law.” Fed. R. Civ. P. 56(c). “When

applying this standard, we view the evidence and draw reasonable inferences

therefrom in the light most favorable to the nonmoving party.” Simms, 165 F.3d

at 1326. The nonmoving party, Truck, must nonetheless present “facts such that a

reasonable jury could find in [its] favor.” Id.


                                          -16-
      Truck argues that the evidence it introduced was sufficient to present a

prima facie case under Colorado law. 8 Truck’s complaint asserted four claims

against MagneTek: (1) strict products liability based on a defective design; (2)

negligent design; (3) breach of implied warranty of merchantability; and (4)

breach of implied warranty of fitness for a particular purpose. Though the

elements of these claims vary, one constant is the need for the plaintiff to prove

causation. See Colorado Jury Instructions Civil 4th (2001) §§ 14:1 (strict

liability), 14:10 (warranty of merchantability), 14:13 (warranty of fitness for a

particular purpose), 14:17 (negligence).

      The district court ruled that Truck failed to create a genuine dispute as to

whether the ballast could have reached the temperatures necessary to start the fire.

The court found that question is beyond the experience of the average layperson,

and therefore that expert testimony was required to prove causation. This was

within the court’s discretion. See Oliver v. Amity Mut. Irrigation Co., 994 P.2d

495, 497 (Colo. Ct. App. 1999). Because the court had already stricken all expert

testimony relating to pyrolysis, it ruled that Truck had failed to provide evidence

that would permit a rational trier of fact to find that the MagneTek ballast caused

the fire, and thus granted summary judgment on all four of Truck’s claims.


      8
        In this diversity case, we apply the substantive law of Colorado. See Erie
R.R. v. Tompkins, 304 U.S. 64 (1938); Habermehl v. Potter, 153 F.3d 1137, 1139
(10th Cir. 1998).

                                        -17-
      Truck argues that it did not need the excluded expert testimony to present

sufficient evidence of causation. It claims that jurors could draw from the other

available evidence a “reasonable inference” that the ballast caused the fire. Truck

quotes our decision in Weir v. Federal Ins. Co., where we said, “An inference

need not be justified beyond all doubt and is not precluded by a mere possibility

that the contrary may be true.” 811 F.2d 1387, 1392 (10th Cir. 1987) (quoting

Fain v. GTE Sylvania, Inc., 652 S.W.2d 163 (Mo. Ct. App. 1983)). Initially, we

note that Weir and the other cases Truck cites for this proposition relate to the

basis for proof of a defect, not for proof of causation. See, e.g., Werth v. Makita

Elec. Works, Ltd., 950 F.2d 643 (10th Cir. 1991); Union Ins. Co. v. RCA Corp.,

724 P.2d 80 (Colo. Ct. App. 1986). To the extent those cases discuss a plaintiff’s

need to use circumstantial evidence and inferences to prove a defect in a product

that has been destroyed, they are inapposite, as the product at issue here – the

ballast – was recovered from the fire and subjected to testing.

      Nevertheless, Truck is correct that causation may also be inferred by a jury

if the plaintiff has provided evidence that would make the inference reasonable.

In this case, however, we agree with the district court that without the excluded

expert testimony regarding pyrolysis, a jury could not reasonably make the

necessary inference that the ballast caused the fire.




                                         -18-
      Viewing the evidence in the light most favorable to Truck, a rational jury

could find the following facts about the cause of the fire: (1) The fire started in

the void area below the kitchen floor and above the storage room ceiling; (2) the

flourescent light fixture was affixed to the ceiling in the area where the fire

started; (3) the ballast shorted; (4) due to the short, the ballast allowed the fixture

to overheat despite the presence of a functioning thermal protector; (5) the

maximum temperature the ballast could have reached was 340°. 9

      The problem for Truck is a sixth fact, which Truck could not contest

without relying on pyrolysis: Wood normally will not catch fire until exposed to a

heat source of nearly 400°. The district court correctly ruled that the ignition

temperature of wood is beyond the experience and understanding of the average

layman. That fact then must be proven by expert testimony in circumstances

where there is no flame or other heat source approaching 400°. See Fed. R. Civ.

P. 702. Without the excluded expert testimony discussing pyrolysis, the only


      9
         This assumes, as it must given our standard of review of a grant of
summary judgment, see Simms, 165 F.3d at 1326, that the jury ignored various
arguments by MagneTek, including that electrical wiring in the void might have
caused the fire, that the discoloration of the ballast was not in fact evidence of a
short, that the ballast would not have actually approached the 340° claimed by
Truck, and that any heat from the ballast would have been dissipated by the eight-
foot light fixture, the ceiling material, and the air in the void space. It also does
not take into account the fact that any heat created by the ballast would be
dissipated as it flowed from the ballast to the metal casing of the fixture, through
the 5/8 inch gypsum board ceiling, and into the wood furring strips that caught
fire, as Truck alleges.

                                          -19-
evidence about the required ignition temperature was that wood will only catch

fire at approximately 400° and above. This leaves a gap of over 50° between the

maximum possible temperature of the ballast here and the minimum possible

temperature of ignition. Without pyrolysis, Truck could not bridge that gap. 10

      Truck focuses on arguing that circumstantial evidence may be used to prove

causation. Again, we do not disagree with that general proposition. But before a

plaintiff can rely on circumstantial evidence or the process of elimination Truck

urges on us here, the plaintiff must at least present evidence to show why the

defendant’s product should not be among the possible causes to be eliminated.

See, e.g., Hollander v. Sandoz Pharm. Co., 289 F.3d 1193, 1211 (10th Cir. 2002)

(requiring plaintiffs’ experts to “rule in” the defendant’s drug “as a scientifically

plausible cause”); Franklin v. Skelly Oil Co., 141 F.2d 568, 570-71 (10th Cir.

1944) (“It is not sufficient to show a set of circumstances bringing the theory of

appellants within the realm of possibilities . . .”); Kaiser Found. Health Plan v.

Sharp, 741 P.2d 714, 719 (Colo. 1987) (en banc) (“[T]he plaintiff must establish

causation beyond mere possibility or speculation.”). 11

      10
         Indeed, Dr. Romig’s deposition testimony shows that he did not think
there was any “viable source of ignition” that did not involve the pyrolytic
process.
      11
         Requiring Truck to show that the ballast was capable of causing the harm
of which they complain conforms not only with the established law of Colorado
and this circuit, but with the investigatory standards of the National Fire
                                                                        (continued...)

                                         -20-
       In this case, we agree with Lt. Pfannenstiel that in order to conclude that an

appliance like the MagneTek ballast caused a fire, not only must one find that the

appliance was in the area of origin, but “you need to show whether or not that

appliance is capable of producing . . . enough heat to be a competent ignition

source.” The only admissible evidence in this case showed that the ballast’s

maximum temperature would have been approximately 50° below that required to

start a fire.

       Any fact finder that found in Truck’s favor on the issue of causation would

thus have had to either rely on the pyrolysis theory or believe that the ballast

temperature approached 400°. A jury that took the first path would be speculating

or relying on a theory that the court found insufficiently reliable even for trained

experts. A verdict based on the second rationale would be directly contradictory

to the uncontested evidence that the ballast temperature could not have exceeded

340°. Jury verdicts may not be based on speculation or inadmissible evidence or

be contrary to uncontested admissible evidence. See Franklin, 141 F.2d at 570;

Kaiser, 741 P.2d at 719. We therefore find that the district court did not err in

granting MagneTek’s motion for summary judgment.


       11
          (...continued)
Protection Association, see NFPA Guide for Fire and Explosion Investigation 921
§ 18-4.1 (“Before it can be concluded that a particular appliance has caused the
fire, it should first be established how the appliance generated sufficient heat
energy to cause ignition.”).

                                         -21-
                                     Conclusion

      Though the theory of long-term, low-temperature ignition of wood is an

interesting one that eventually may be sufficiently tested and researched to serve

as the basis for an expert opinion under Rule 702, the district court’s careful

analysis of the scientific literature presented in this case convinces us the court

did not abuse its discretion in ruling that the foundation for pyrolysis has not yet

reached that point. We also hold that the court did not err in granting summary

judgment because without the pyrolysis theory, Truck could not produce evidence

that would allow a rational trier of fact to find that the ballast could have become

hot enough to start the fire at Sammy’s Restaurant.

      The judgment of the district court is therefore AFFIRMED.




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